georgehifi
Responses from georgehifi
| 5% THD to .000 THD SOUND derrickengineer You can get minuscule distortion figures (.0001%) on a poorly designed amp with massive amount of GLOBAL feedback, and they sound rubbish. The best is to get minuscule distortion under (.1%) without any or very little global fee... | |
| Parasound HCA-2200? This excerpt from a Stereophile review should give you an indication of which way to go. Cheers George In recent years, Curl has been a consultant to Parasound, and was responsible for the revision of the Parasound HCA-2200 amplifier to Mark II s... | |
| Usher R1.5 should I buy? Sorry I have no idea about the V1 and V2.I send the circuit diagram to you, Usher 2.5, same for 1.5 just less rail volts and output transistors.Should anyone else want it on Audiogon can you contact vvvinashhh@yahoo.co.in and he will pass it on. C... | |
| Usher R1.5 should I buy? I had the circuit, but it’s long gone now, but if you warm it up with the lid on for at least an hour, and if still not warm enough (use Pass palm test) Monitor the bias across the emitter resistors (yes they used them the same way as NP did, coll... | |
| Usher R1.5 should I buy? vvvinashhh I might also add the ones I've played around with, were under biased,, and needed to to be adjusted a bit higher to get the Class A bias of the Thresholds, "as Nelson palm detector adjustment", enough bias to keep the palms of you h... | |
| Usher R1.5 should I buy? vvvinashhh Usher R1.5 and R2.5 were almost direct copies of the Threshold Stasis S200 and S300. I showed Nelson Pass the circuits of the Ushers, and the only difference was they had one extra gain stage transistor in them, which Nelson replied... | |
| Bel Canto C7r vs Parasound Halo Integrated Well to me it's definitely not hi-end yet, one day yes, when the switching frequency is 3mhz or better, then I will call it hi-end, and even own it myself, then my boat anchors will be sold or become door stops.Cheers George | |
| Bel Canto C7r vs Parasound Halo Integrated To me no comparison, the Halo. It’s designed by the master John Curl and it’s a linear amp with balls. John Curl has the same circuit design ethics as Dan Agostino (Krell fame) The Bel Canto is Class D, once the switching frequency technology (ne... | |
| Plinius Hautonga or Hegel H360? mountainsong Where all the power is needed on these Kef's is in the bottom end, quite broad between 2-3ohms, between 30hz to 200hz,, I be looking for amps that have good current delivery, amps with bi-polar (bjt) output stages, before mosfet o... | |
| Tube Phono Stage with balls, and slam!! +1 for the Vincent pair, it has the tube input for your "tube" sound, but from what I can see on the net, a solid state output to be able to give you drive and dynamics. It is very versatile, with different gain options and it looks well made. htt... | |
| Help wanted: Bass! rbschauman Did you see this link I gave you before to try, you should.http://s89.photobucket.com/user/jeffreybehr/media/C-j%20equipment/PremierElevenoutputwiring1150_cmprsd.jpg.html Cheers George | |
| Should I buy a Class A Amp. Most Pass Labs amps are also high biased A/B amps, and yes if you were to play a piece of music that was very mellow like slow blues, some Class A/B amps may stay in Class A. But maybe with a full blown orchestra that same amp may go into class B.... | |
| Sony CDP-XA7ES vs CEC TL-1 transport You CEC is now over 10 years old, and a very nice transport, it could be the laser is getting tired.The laser is cheap, and if your handy, easy to change.The TL-1 uses a Sanyo SF-90 laser, very cheap, I would change it first for this small outlay.... | |
| Should I buy a Class A Amp. After 20 years of use even though all metal parts were aluminium, electrolysis started, it started to get corrosion, it was getting dangerous, so I rebuilt it into a normal big amp with big heat sinks hi bias first 30w Class A and sold it.Cheers ... | |
| Should I buy a Class A Amp. All high bias Class A/B I think except for an early massive Gryphon which was suppose to be pure class A to clipping into 8ohms.You just have to look at the old huge ML25 monoblocks which were 25w pure class A only into 8ohms. The heat factor goes... |